Countersunk screw stainless steel M10

Characteristics: 

• Material: Galvanized steel 
• metric internal thread M10 
• thick-walled design (panel thickness approx. 2 mm) 
• Nut height (including plate): approx. 12.0 mm 
• Required pre-drilling diameter: approx. 12 mm 
• The special insert nut is fastened with 2 chipboard screws
  (approx. 4 mm diameter).
• The climbing holds are attached using a standard M10 screw

Option with chipboard screws,
properties of the chipboard screws:

• Fully threaded screw with an attractive pan head for universal
  fastening of metal fittings or plastic brackets in wood
  in dry indoor or damp areas.
• Ideal power transmission thanks to RW drive
• More power due to a larger contact area on the bit
• Increased stability, one-handed operation, precise positioning thanks to
  the plug-in effect and perfect bit fit.
• ASSY 4 PH Steel galvanized Full thread Pan Head RW
• SHR-PANHD-HO-RW20-(A3K)-5X20/18, ASSY
  4 PH

Conclusion:

The "PROFESSIONAL" special T-nut offers a
high-quality alternative to the standard T-nut. It also has advantages
over other special T-nuts that
are mounted with four chipboard screws. This is due not only to the halved
installation effort of the
"PROFESSIONAL" special T-nut, but also to its increased load-bearing capacity. The two holes
for the chipboard screws have a significantly larger diameter than
the four holes in a conventional special T-nut. This allows for
the use of thicker screws when installing the "PROFESSIONAL
," providing optimal stability for your climbing holds.

Installation:
As a first step, create a grid and mark all the locations where the T-nuts will later be installed. For bouldering walls, a 10 cm hole spacing is recommended (95 T-nuts required per square meter) or a 15 cm spacing (45 T-nuts required per square meter), with the second row offset from the row above. Alternatively, you can use exactly as many T-nuts as you have climbing holds. The disadvantage of this method is that you have limited options for repositioning the holds on the wall. Furthermore, if you extend the climbing wall to add more T-nuts, the entire panels would have to be removed. After marking the locations for the T-nuts, drill 12 mm holes at these points. The T-nut is then inserted into the panel from the back through these holes. For a better hold, apply a special wood-to-metal adhesive to the T-nut.